I have the unfortunate habit of smiling when I hear something really terrible. I don’t think the horrible news is funny and I’m not amused but I have this involuntary pull up of my lips.
Friend: My parents were both diagnosed with cancer this morning.
Me: (Smile. Quickly cover face with hands) Oh, that’s terrible. I’m so sorry.
Friend: Why are you smiling. It’s not funny.
Me: (Still smiling. Keep one hand over bottom part of face) I know! It’s terrible.
Friend: They have less than six months to live.
Me: (Suck in lips. Shake my head hoping the motion will kill the smile twitch) God. I’m sorry, sorry. . .
I am exaggerating (slightly).

